Concentration quenching of a red emitting electroluminescent dye tetraphenylporphyrin: A time-resolved photoluminescence study

R N Bera, Y Sakakibara, M Tokumoto

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3 Citations (Scopus)

Abstract

This work deals with the steady-state and time-resolved photoluminescence study of a well-known red emitting electroluminescent dye, tetraphenylporphyrin (TPP), doped in poly(methylmethacrylate). From the time-resolved photoluminescence (PL) study, exponential decay of TPP emission was observed for these doped films in the studied concentrations region (10(-4)-10(-1) mol/L). At lower doping concentrations below 10(-2) mol/L, PL lifetimes of TPP were relatively constant (similar to 10 ns) and equal to that of TPP in dilute solution. A decrease in PL lifetime was observed at high doping concentration, down to 8 ns at a concentration of 10(-1) mol/L. This observed decrease in PL lifetime of TPP with the increase of TPP concentration was due to the concentration quenching of TPP monomer emission by the TPP dimer/aggregate sites formed at such higher concentrations. The results of concentration quenching in TPP system were compared to that of tetraphenylchlorin system reported earlier. (C) 2005 Springer Science + Business Media, Inc.

Original languageEnglish
Pages (from-to)549-552
Number of pages4
JournalJournal of Materials Science: Materials in Electronics
Volume16
Issue number8
DOIs
Publication statusPublished - Aug 2005

Keywords

  • REDUCED PORPHYRIN COMPOUND
  • HOLE-TRANSPORTING MATERIAL
  • ENERGY-TRANSFER
  • LIGHT EMISSION
  • TETRAPHENYLCHLORIN
  • DEVICES
  • DIODES
  • ENHANCEMENT
  • FILMS
  • LAYER

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